VBUS05M2-HT1

www.vishay.com

Vishay Semiconductors

Rev. 1.4, 17-Sep-2019

2

Document Number: 85923

THIS DOCUMENT IS SUBJECT TO CHANGE WITHOUT NOTICE. THE PRODUCTS DESCRIBED HEREIN AND THIS DOCUMENT

APPLICATION NOTE

The VBUS05M2-HT1 is a two-line ESD protection device with a bidirectional and symmetrical (BiSy) breakdown and clamping

performance made for application with a voltage working range up to ± 5.5 V. The high ESD immunity and a very low

capacitance makes it usable for high frequency applications like USB2.0, USB3.0, or HDMI.

With the VBUS05M2-HT1 two high speed data lines can be protected against transient voltage signals like ESD (electro static

discharge). Connected to the data line (pin 1 and pin 2) and to ground (pin 3) negative transients will be clamped close above

the 5.5 V working range.

FLOW THROUGH DESIGN

Modern digital transmission lines can be clocked up to 480 Mbit/s (USB2.0) or 1.65 Gbit/s (HDMI).

At such high data rates the transmission lines like cables or the line traces on the PCBs have to be very homogeneous regarding

their surge impedance. This requires well defined trace dimensions as trace width and distance which have to be calculated

depending on the requested surge impedance (e.g. 50

) and the PCB material and layer dimensions. Any device connected

to the data lines - like ESD protection devices - have to be connected with minimal changes in these trace dimensions and

distances.

With the package in the so called “Flow Through Design” this is possible. The lines are running straight along the PCB while the

VBUS05M2-HT1 is placed on top without any via or loops.

SCHEMATIC DIAGRAM

Fig. A

The simplified schematic diagram in Fig. A shows three identical Z-diodes with the cathode on pin 1, 2, or 3 and common

anodes. In reality each Z-diode consist of one Z-diode for the adjustment of the breakdown voltage, and two low capacitance

ELECTRICAL CHARACTERISTICS (pin 1 or pin 2 to pin 3; in both directions)



PARAMETER

TEST CONDITIONS/REMARKS

SYMBOL

MIN.

TYP.

MAX.

UNIT

Protection paths

Number of lines which can be protected

-

-

2

lines

Reverse stand-off voltage

Max. reverse working voltage

--

5.5

V

Reverse voltage

5.5

-

-

V

Reverse current

-

< 0.001

0.1

μA

Reverse breakdown voltage

7.5

8.5

9.5

V

Reverse clamping voltage

-11

13

V

-15

18

V

Clamping voltage

-19-

V

-27-

V

Dynamic resistance

-1-



Capacitance

-

0.35

0.4

pF

-

0.35

0.4

pF

12

3

=